AMD 4000+ not reaching full potential

Baker

Baker

Baker

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27 Sep 2004
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ive recently jus aquired a 4000+ from a member on these forums. i have heard these can get to some pretty decent speeds on air, so i thought id give it a try. i was stable at about 2.640, so i thought id go up, so i raised the frequency to 260 x 11. nothing, welll, a loop of restarting. so i reduced back, but then it wouldnt even go back to 2.640. im now on 2.59 (236x11)

im disappointed with this as i would very much it to be at a maximum. the temps are 33 degrees when it was at 2.64, so heat is no problem there.

im running an A8NE - ultra
1.5 gb ram (2xgeil dual channel, 1 x hynix)
120gb IDE
120gb SATA
arctic cooling 64 bit cooler

is there anything that perhaps im missing out?
any help appreciated
 
I'd say try the ram with just 2 sticks in dual channel - or better still buy 2 x 1 gig sticks like i did ...

My KAB1E 4000 sits at 3.1Ghz on air idling at about 35-40 :)

This is with a DFI RDX 200 mobo and an x1900xt all powered by a 500w Enermax Liberty.

I think mines at 259x12 @ 1.4v (i think!?) :p
 
I have the same problem with mine. It sits happily at 217x12, 2.6ghz stable and cool (18 degrees idle/32 playing Oblivion) as you like but i just can't get the damn thing stable at 3ghz, even then it will not bench even with 1.5v. It's watercooled so temps are not an issue. I put the ram on a 333 divider so that when the cpu is at 12x250 (3ghz) the ram is sitting at 192mhz. I dropped the htt from 5x to 4x. I was hoping that with a top end 939 mobo like mine and watercooling coupled with a Seasonic S12 650w Energy+ i could get stable at least at 3ghz. My rig is in my sig with latest drivers, bios etc.
 
I guess its just luck of the draw in which case, as with the components you've got 3Ghz shouldn't be a problem to reach and maintain ... getting a good batch CPU or not can make or break its value to you as an overclocker ... i just got lucky it seems :o
 
well to be honest i dont think taking out the 1x512gb hynix would work (or at least make any noticable difference)

i thought it might perhaps be a problem with the motherboard, possibly having a limit on the frequency.

i dont really want to change the cpu voltage though, as im not too confident with doing that.
 
You'd be surprised how much the memory and its timings affect your clock. You haven't stated what timings your ram is at, would be worth doing so. From experiance mixing ram and not running in dual channel isn't the best for getting good clocks.
Also 2.6gig on stock voltages is pretty good, it takes me 1.56v on my 3700 to get it 100% stable at 2.8.
 
Mine will run multiple runs of 3dmark, superpi, rthdribl no problem at 250x12 (3ghz) but will fail prime and randomly crash during games.

Absolutely rock solid stable at 265x11 though.
 
I've got my [email protected] under an Freezer 64 with a 120mm Yate Loon fan on it. @1.45v It's prime stable and never goes above 50C. It only reaches 50C if my room is pretty hot but only when priming. I think it must be the luck of the draw really, I got mine from OCUK when they first had them on "this week only" can't remember the stepping I have but i've never had any problems. It does 250x12 (3ghz) at stock volts no problem. i think i'm running at 267x12 just to get that magic 3.2 figure, the rams also running at 267 with 3-4-4-8 timings at err 2.8 or 2.9v can't remember.
 
Right, got it stable at 3ghz but with 1.55v which i did'nt like. 250x12 with the ram on a 333 divider and timings of 2.5-2-2-5 1T. Temps were 20 idle/32 load. That's also been running Prime all night.

Dropped it back to 2.6 (217x12) on stock volts now as i did'nt like the voltage increase. Memory is 1:1 running at 217mhz (DDR 434) 2.5-2-2-5 1T @2.6v.

The thing is with this motherboard you can't increase the chipset voltage so i don't know if thats what's holding it back. The cpu is a KAB2E stepping. Think i might just give up now and wait till i switch to Conroe when the price drop comes in force.
 
im tempted to raise the voltage now.

its just a need a decent cpu as i do a lot of rendering which does eat up resources
 
if you do a lot of rendering you shouldnt have bothered getting a 4000+sd. single core san diego's are totally outclassed by dual core a64's and especially c2d's.

anyway, have you remembered to lower the HT multiplier?
 
yeah i know, its just a cost issue with me, if i had enough i would set up an intel rig, but thats not possible right before uni.

yeah ive lowered the multiplier to 10.5 now
 
no, the HT bus multiplier. it defaults to 5x but when you're upping the fsb you NEED to lower it. the idea is to keep the overall HT speed under 1000mhz.

If your aming for 270fsb for example, youd need a 4x HT multi or even a x3 - 270fsb (x4) = 1080HT which most boards can do, but most boards wont budge over 1200mhz or so. There's no performance loss with keeping it <1000mhz, so look for that setting and set it to 3x or 4x. assuming you haven't touched the HT multiplier yet, that could well be the reason you're stuck at 236fsb - 236 x5 = 1180mhz. 180mhz over-spec.
 
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